Structure and evolution of flux transfer events near dayside magnetic reconnection dissipation region: MMS observations
Structure and evolution of flux transfer events near dayside magnetic reconnection dissipation region: MMS observations
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日侧磁重联耗散区附近通量传递事件的结构和演化：MMS 观测
DOI：
10.1002/2017gl073411
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发表时间：
2017-06
影响因子：
5.2
通讯作者：
J.B.Cao
中科院分区：
文献类型：
--
作者：
X.C.Dong;M.W.Dunlop;K. Trattner;T. Phan;H.Fu;J.B.Cao
我们研究了一系列的三个小规模通量转移事件（fte），这些事件与重新连接的通量绳有关，最近由附近的白天磁重联线产生。这些数据是由磁层多尺度航天器在当地时间中午附近观测到的。我们发现相关的fte是由二次磁重联产生的，并且具有不同的磁场拓扑，这与多X线磁重联（MR）模型中的预期情况相似。计算结果表明，随着时间的延长，fte的尺寸逐渐增大，且fte处的磁流变重联射流均位于尾缘和外缘。以上特征表明，这些fte从重连区弹射出来后仍处于演化阶段。我们的观察结果表明，中尺度甚至典型尺寸的fte可以由次级MR产生，最初，随后可以在扩散过程中演变成典型尺寸。
We investigate a series of three small‐scale flux transfer events (FTEs) associated with reconnected flux ropes, recently generated by a nearby, dayside magnetic reconnection line. The data are observed by the Magnetospheric Multiscale spacecraft near noon local time. We find that the associated FTEs are created by secondary magnetic reconnection and have different magnetic field topologies, which is a similar condition to that expected in the multiple X‐line magnetic reconnection (MR) model. The calculated results show that the sizes of the FTEs become larger with the time elapsed and the MR reconnection jets at the FTEs are all located on the trailing and outer edges. The above features indicate that these FTEs are still in the evolutionary stage after they are ejected from the reconnection region. Our observations suggest that mesoscale or even typical size FTEs can be created from secondary MR, initially, and subsequently can evolve to a typical size in the process of spreading.
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作者：
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